These days, the media is defining what cultural capital is, and it's easily learned. If you have money, anything can be bought. We see this in China and Russia with what I call the "Bling Dynasty and New Oligarchy" in Generation Wealth. As people got rich and everybody started buying Louis Vuitton bags, it became clear that to distinguish yourself you had to have more than an expensive bag. People began to want the things that money is not supposed to be able to buy - history, tradition, education, and culture.

My photography is often a sociological look at American culture and it's been very well published in the UK.

I've been a documentary photographer for much longer than I have been a filmmaker.

The people in the popular group say there is no peer pressure because they are at the top of the food chain. Really what they are doing is just eating away at everybody else.

I've long been interested in looking at the culture of consumerism and also was interested in this connection between the American dream and the house, and the house being kind of the ultimate expression of self and success.

I'm also looking for the psychological elements that fuel commodity culture. For example, if we imbue girls with deep insecurity about their bodies through images of an impossible ideal, we create a really vulnerable and avid consumer. If somebody feels that they're not OK without a certain product, you have a very deep and loyal market that will come back to the product again and again. Sometimes, this process is both rational and irrational.

The 1970s were the height of social mobility. College was accessible. My grandfather was a poor immigrant who went to a public school in Ohio, and my father went to Harvard. That wasn't unusual. There was a feeling that anything was possible and you didn't have to be born into money to have a successful life. Now, people don't believe in the idea that anything is possible. We have more inequality than we've had ever before and a greater concentration of wealth in the hands of a few.